But Emory University political scientist Andra Gillespie says Georgians still respect Nunn's name.

"The other thing that could potentially work in her favor is the level of competition on the Republican side," Gillespie says. "So, if there is bad blood engendered by the Republican primary, that could actually weaken the Republican party going into the general election."

"There will be a point in a few years where Georgia could potentially be more competitive if the trends in the terms of Latino and African-American partisanship continue," Gillespie says. "But 2014 is probably not that year."

Republican Saxby Chambliss decided not to seek re-elation, opening the door for Nunn.

On the GOP side, three sitting Congressmen and a former Secretary of State are among the candidates.

The only other Democrat running so far is Atlanta doctor Branko Radulovacki.